I know, but does it just add 50% to the current shipyard, or is it a building that just halves all the build times, then you can add a droid to it?

Can you add 4 build droids to a level 9 shipyard, then build a foundry for a total of 58% faster build time at that shipyard, or does it halve the current build times, then the 8% from the droids is taken off of the half that the foundry left over???